Pipe connection



Feb. 15, 1949. A. J. HIERTZ 2,462,040

PIPEVGONNEGTION Filed Juge 19, 1945 IN V EN TOR.

Patented Feb. 15, n 1949 PEE. CNNEC1TIQN Artlulrk J. Hiertz, Bridgeport, Gunn., assigner. to. Bridgeport. Brass. Company... Bridgeport, Conn., @estimation 0f, -Qimectieut Application June 1'9, 1945, Serial" 609,267

3 Claims.

. 1I This mention relates to nire connections. and more particularly to connections'between theY ends of pipes employedv in trapy joint installations.

There are two different types of connections used in trap joint installations. The trap itself consists ,Qi two. tubes, .one of which is known in the. J. tube andthe other of which iS in. the trade. as. the floor or wall tube, the ends of these'tulgelszbeing interconnected by an easily made or unmade'joint. vIn one type joint, relianevis placed on a washer or gasket for producing-.a water-,tight seal and in the other type 2,1 Water-.tight sealjis obtained by direct engagenient of metal surfaces, There isa fairly. evenly divided preference in the plumbing trade for these two types of joints, each of which has heretofore differed from the other with respect to the shape of the end of the oor or wall tube as well as the arrangement at the end of the J tube. This circumstance has required that plumbing supply houses carry stocks of both types of connections in order to supply the demand of the trade.

An object of this invention is means for interconnecting J tubes and oor tubes of such construction that a water-tight seal may be obtained either by use of a gasket or through the medium of metal-to-metal contact, thereby obviating the need for manufacturing and stocking two diierent lines of trap-formingtubes.

Other objects, novel features and advantages of this invention will become apparent from the following specification and accompanying drawings, wherein:

Fig. 1 illustrates the invention as utilized in a gasket type joint;

Fig. 2 illustrates the invention as utilized in a ground joint;

Fig. 3 is an exploded View, and

Fig. 4 illustrates a modication.

In vthe drawings are illustrated merely the end portions of a J tube I0 and a floor or wall tube II which co-operate to form a trap in the wellknown manner. The J tube I0 for a short distance from its end is of slightly larger diameter than the remainder of 'the tube and a collar I2 mounted on said enlargement is sealed to the tube by solder or the like. The collar I 2 has a shoulder I3 engaging the end of the J tube III and is provided with an internal conical surface I4 converging toward the tube IIJ and with an external thread I5. Near its end, the tube II is formed with a portion I6 of greater diameter than the remainder of the tube and having a conical surface I'I complementary to the surface I4 and 2 face. I'I= terminates along a peripherallline somewhat removed iro'mthe end o'f the. tube .I Il' to provide asection t8 off's'ubstantiallyv Athe same diameter as the majorportion vof the tube.

A vnu-t |19 has lij-thread 20 complementary tothe thread `I5 of the'collar I2; It alsohas an inwardly directed ang-e. 2|, the interior surface ofwhich is of slightly larger diameter-thanthe surface of the tube III so that the `iiange 2.I.is engageable with the enlarged diameter portion I6 ofthe tube II. i

In'utilizingthe arrangement above described to. form a washeretypey joint,'a, washer or gasket 22 of .suitable shape 'andA size is applied to theftube section I8 and the two tubes and the nut I9 are arranged as shown in Fig, 3. The end of the tube I I is then inserted into the collar I2 to locate the gasket 22 between the surfaces I4 and I1, after whichthe nut I9 is threaded onto the collar I2 as shownin Fig. 1. In this arrangement, the section I8 of the tube I I does not project into the enlarged end portion of the tube I0.

In utilizing the arrangement above described to form a ground joint, the gasket 22 is discarded and the end of the tube I I is introduced into the collar I5 to bring the surface I'I into contact with the surface I4 after which the nut I9 is threaded onto the collar I2. In this arrangement, the section I8 of the tube II projects slightly into the end of the tube I0 as shown in Fig. 2.

In the production of a washer type joint, the section I8 of the tube II serves as a carrier for the washer 22 while the tube II is brought into proper relation to the tube I 0. Upon insertion of the tube Il into the end of the tube I0, the gasket 22 is moved into position to have its opposite faces engaging the surfaces I4 and I1. The portion I 8 also constitutes a reinforcement to minimize the possibility of deformation of the conical surface I 'I prior to its engagement with the surface I4 in the production of a ground type joint. The washer 22'is of standard type with suflicient rlexilibity to allow for assembly on the section I8. i

As shown in Fig. 4, the collar I2 may be formed without the shoulder I3 and may be mounted on a tube IIJ with the end of the latter flared outwardly as shown at Illa into contact with the conical surface I4 of the collar and the collar may be soldered to the tube. With this arrangement, the conical inner surface of the ared p0rtion IIla is engaged either by a surface of the gasket 22 or by the surface I1, depending upon whether a washer-type joint or a ground joint is converging toward the end of the tube. The surdesired.

It is of course understood that various modications may be made in the structure above described without in any way departing from the spirit of the invention as defined in the appended claims.

I claim:

1. A pipe joint including cooperating metal male and female tapered seats formed to provide cooperatively a fluid-tight metal-to-metal junction when forced directly together, and with the male seat tapering to a smaller minimum diameter than the minimum diameter of the female seat and having a holder for a non-metallic gasket projecting forwardly therefrom, whereby when desired a non-metallic gasket may be positioned parallel the male seat with said holder restraining the gasket from sliding off due to tlle v taper of the male seat, and a fastening for holding said seats forced together both in direct contact and when spaced by the use of said gasket, the joint being formed to provide clearance for said holder when said gasket is not used and said fastening forces the seats directly together.

2. A joint as defined by claim 1 with said gasket holder comprising a short tubular part projecting forwardly from said male seat at a different angle than the latters taper, whereby to restrain a flexible gasket tted flatly thereon against wedging off due to the male seats taper.

3. A plumbing pipe joint adapted to function as either a ground or Washer type and including adjacent tube ends provided respectively with cooperating metal male and female tapered seats formed to provide cooperatively a ground type or metal-to-metal fluid-tight junction when forced directly together, the tube end with the male seat also having a cylindrical extension projecting a short distance forwardly in front of its seat, whereby to restrain a flexible non-metallic washer or gasket exed onto the male seat from Wedging itself off when a washer type Joint is desired, the tube end with the female seat being enlarged in diameter respecting said extension to provide clearance for the same when the joint is operating as the ground type without using a washer, and the female seat having a larger minimum diameter than the male seat whereby to cooperate therewith both when the washer is used and when the two seats directly contact, and a screw fastening for holding said tube ends forced together regardless of whether the washer is used.

ARTHUR J. HIERTZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 188,213 Weiss Mar. 6, 1877 918,843 Glidden Apr. 20, 1909 1,533,886 Mueller et al Apr. 14, 1925 FOREIGN PATENTS Number Country Date 28,949 Great Britain Dec. 31, 1903 29,811 Great Britain May 5, 1910 143,432 Great Britain May 27, 1920 

